tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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fix page release issue in filemap_fault

find_lock_page increases page's usage count, we should decrease it
before return VM_FAULT_SIGBUS

Signed-off-by: Yan Zheng<yanzheng@21cn.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

Yan Zheng and committed by
Linus Torvalds 745ad48e dd204d63

+1
+1
mm/filemap.c
··· 1388 1388 size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; 1389 1389 if (unlikely(vmf->pgoff >= size)) { 1390 1390 unlock_page(page); 1391 + page_cache_release(page); 1391 1392 goto outside_data_content; 1392 1393 } 1393 1394